REFRIGERATION SYSTEM CONTROL

A method and system for use with a volume containing a cargo (30) having a thernal mass includes, at least one temperature sensor (50) associated with the cargo to provide at least one temperature associated with the thermal mass, a refrigeration unit (40) associated with the volume, and a controller (60) to control the refrigeration unit (40) in response to the at least one temperature associated with the thermal mass and a temperature set point, wherein the controller (60) models a temperature characteristic of the thermal mass.